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137171-51-8

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137171-51-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 137171-51-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,1,7 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137171-51:
(8*1)+(7*3)+(6*7)+(5*1)+(4*7)+(3*1)+(2*5)+(1*1)=118
118 % 10 = 8
So 137171-51-8 is a valid CAS Registry Number.

137171-51-8Relevant articles and documents

The behaviour of Lawesson's reagent and dialkylaminophosphines towards dicyanomethylene derivatives of xanthone and fluorenone

Abdel-Malek, Hoda A.

, p. 457 - 464 (2003)

Lawesson's reagent 1 reacts with xanthen-9-ylidenemalono-nitrile 3 to give adducts 5a, 6a and 7, respectively. In case of the reaction of fluoren-9-ylidenemalononitrile 4 with 1, only 3-amino-2-fluoren-9-ylidene-3- thioxopropanenitrile 5b is obtained toge

Reactions of nitroxides with sulfur-containing compounds, part IV: Synthesis of novel nitroxide (thio)ureas

Zakrzewski, Jerzy,Krawczyk, Maria

, p. 393 - 401 (2007/10/03)

The reactions of 4-isothiocyanato-2,2, 6,6-tetramethylpiperidine-1-oxyl 2 and 4-isocyanato-2,2,6,6-tetramethylpiperidine-1-oxyl 3 with selected amines and lower alcohols give the corresponding novel thioureas 4, ureas 5, thiocarbamates 6, and carbamates 7, all bearing the nitroxyl moiety. The characteristic features of EI mass spectra of (thio)ureas 4 and 5 are described. Some of the synthesized thioureas 4, ureas 5, thiocarbamates 6, and carbamates 7 are moderately or weakly active against pathogenic fungi.

THE BEHAVIOUR OF p-QUINONEDIIMINES TOWARDS 2,4-BIS-(4-METHOXYPHENYL)-1,3,2,4-DITHIADIPHOSPHETANE-2,4-DISULFIDE

Zayed, M. F.,Khir-El-Din, N.,El-Khoshnieh, Y. O.

, p. 243 - 247 (2007/10/02)

p-Benzoquinonediimines (IIIa-c) react with 2,4-bis-(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide (I) to produce compounds Va-c. p-Naphthoquinonediimines (IVa,b) react with the same reagent to produce compounds Xa,b. Key words: p-Benzoquinonedibenzenesulfonimine IIIa; p-benzoquinonedimethanesulfonimine IIIb; p-benzoquinonedibenzimide IIIc; 1,4-naphthoquinonedibenzenesulfonimine IVa; 1,4-naphthoquinonedimethanesulfonimine IVb; 2,4-bis-(4-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulfide (Lawesson Reagent) I; 1,3,2-benzoazathiaphophole-2-sulfides (V); 1,3,2-naphthoazathiaphophole-2-sulfides X).

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